Influence of Alq3 as Electron Extraction Layer Instead of Ca on Photovoltaic Performance of Polymer Solar Cells

HE Xiao-guang; WANG Ning; TIAN Miao-miao

doi:10.3788/fgxb20143510.1240

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Influence of Alq₃ as Electron Extraction Layer Instead of Ca on Photovoltaic Performance of Polymer Solar Cells

更新时间：2020-08-12

- Influence of Alq₃ as Electron Extraction Layer Instead of Ca on Photovoltaic Performance of Polymer Solar Cells
- Chinese Journal of Luminescence Vol. 35, Issue 10, Pages: 1240-1245(2014)
- 作者机构：
  
  1. 中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,吉林长春,130022
  2. 长春师范大学物理学院,吉林长春,130032
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20143510.1240
  CLC： TN383+.1
- Received：12 July 2014，
  
  Revised：21 August 2014，
  
  Published：03 October 2014
- 稿件说明：
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贺小光, 王宁, 田苗苗. 八羟基喹啉铝取代钙作为电子传输层对聚合物太阳电池光稳定性的影响[J]. 发光学报, 2014,35(10): 1240-1245

HE Xiao-guang, WANG Ning, TIAN Miao-miao. Influence of Alq3 as Electron Extraction Layer Instead of Ca on Photovoltaic Performance of Polymer Solar Cells[J]. Chinese Journal of Luminescence, 2014,35(10): 1240-1245
贺小光, 王宁, 田苗苗. 八羟基喹啉铝取代钙作为电子传输层对聚合物太阳电池光稳定性的影响[J]. 发光学报, 2014,35(10): 1240-1245 DOI： 10.3788/fgxb20143510.1240.

HE Xiao-guang, WANG Ning, TIAN Miao-miao. Influence of Alq3 as Electron Extraction Layer Instead of Ca on Photovoltaic Performance of Polymer Solar Cells[J]. Chinese Journal of Luminescence, 2014,35(10): 1240-1245 DOI： 10.3788/fgxb20143510.1240.

摘要

通过选择高效窄带隙聚合物给体材料PTB7与电子受体材料PC71BM作为聚合物太阳电池的活性层，采用Glass/ITO/poly（ethylenedioxythiophene）：polystyrene sulphonate（PEDOT：PSS）/PTB7：PC

BM/electron extraction layer（EEL）/Al的器件结构研究了不同EEL对器件性能及光稳定性的影响。通过采用小分子有机材料Alq

与低功函数碱金属Ca作为EEL，发现由于Ca的活泼金属特性及不稳定性，以Ca作为EEL的聚合物太阳电池的初始效率在3d之后就下降了60%；而以Alq

作为EEL的器件在空气中放置一个月之后其初始效率仅下降30%。此外，以Alq

作为EEL的器件光伏效率完全比得上传统器件中以Ca作为EEL的光伏器件。研究结果表明，Alq

是一种潜在的长寿命聚合物太阳电池的EEL材料。

Abstract

Thieno thiophene/benzodithiophene (PTB7) and -phenyl C71-butyric acid methyl ester (PC

BM) were selected as donor and acceptor

respectively. The device architecture was glass/ITO/poly(ethylenedioxythiophene):polystyrene sulphonate (PEDOT:PSS)/PTB7: PC

BM/electron extraction layer (EEL)/aluminum. For comparison

tris (8-hydroxyquinoline) aluminum (Alq

) and calcium (Ca) were used as EEL to reveal their influence on the performance (power conversion efficiency (PCE)

short-circuit current density (

)

open-circuit voltage (

)

and fill factor (

)) of the OPVs. As a result

PCE of the device with Ca as EEL rapidly reduced over 60% after three days due to the poor stability of Ca. The device with Alq

as EEL showed favorable stability owing to the PCE moderate declined less than 30% after one month. Furthermore

PCE of the device with Alq

as EEL was fully comparable to that with Ca as EEL. Our results indicate that Alq

is an alternative candidate for high-performance and long-term photo-stability OPVs.

关键词

Keywords

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State Key Lab of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences

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